originally posted my issue in the troubleshooting section here thinking it was a one time thing, but sadly it is not. i missed all phone calls and texts messages on monday. i hadn't made a phone call myself so i didn't know there was an issue. tuesday morning web pages were not loading on my phone, so i shut the phone off and turned it back on. a series of texts messages from the previous day showed up instantly. then i talked to some friends who said they tried calling me the previous day with no response. yesterday everything seemed fine, and today, again, no texts received and could not call out or receive calls. friend tried calling my phone as i stood next to him and nothing showed up on my phone. i shut my phone off, on again, and now things work. this is a huge issue and i'm sure it's caused by 3.1. i see the thread regarding unresponsive phones, but i wanted to start a new one because my phone issues are slightly different. anyone else having my issue (inability to make or receive calls, no texts received)? going to genius bar tomorrow. will report back.